Methods and apparatus for high propane recovery

F - Mech Eng,Light,Heat,Weapons – 25 – J

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F25J 3/00 (2006.01) C07C 7/00 (2006.01) F25J 3/02 (2006.01)

Patent

CA 2388791

Methods and configurations for an improved propane recovery plant which employs an absorber column (110), and a deethanizer column (120) with an overhead condenser (130) that produces a reflux condensate (140). The reflux condensate (140) is recycled to both the absorber column (120) and the deethanizer column (120), and a third recycling loop feeds propane (116) from the absorber column (110) into the deethanizer column (120) in a gaseous form. The overhead condenser (130) employs cold reject gas from the absorber and/or propane as a refrigerant, and preferred deethanizer columns include an integral water removal contactor.

L'invention concerne des procédés et des configurations utilisables dans des installations de récupération améliorée de propane. On utilise une colonne absorbante et une colonne de déséthanisation avec condenseur produisant un condensat de reflux, lequel est recyclé vers les deux colonnes susmentionnées. Une troisième boucle de recyclage injecte le propane depuis la colonne absorbante vers la colonne de déséthanisation sous forme gazeuse. Le condenseur utilise les rejets de gaz froids de la colonne absorbante et/ou du propane comme réfrigérant. En mode de réalisation préféré, la colonne de déséthanisation comprend un contacteur intégré pour la séparation de l'eau.

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